Roll-head.



M. R. RUST.

ROLL HEAD.

APPLICATION FILED JULY x. I9I5.

Patented Feb. 22, 1916.

' end of the roll.

MORTIMER R. RUST, OF FULTON, NEW YORK.

ROLL-HEAD.

Specification of Letters Patent.

Patented Feb. 22, 1916.

Application filed July 1', 1915. Serial No. 37,463.

To all whom it may concern:

Be it known that I, MORTIMER R. RUST, a citizen of the United States, residing at F ulton, in the county of Oswego and State of New York, have invented certain new and useful Improvements in Roll- Heads, of which the following is a specification.

This invention relates to roll heads or journal heads, and to the means for securing such heads to the wooden press rolls, or other like rolls where the heads are made separately. So far as this applicant is acquainted with the subject, press rolls used in paper mills and similar machines have a body turned from a log of wood. Holes are bored lengthwise through the roll for the center shaft and rods located at other points about the shaft. Different size rolls have a different number of rods besides the center shaft. The trouble with this construction is that the long rods stretch, and the center shaft will not prevent the journal head from rocking when a heavy pressure is applied to the roll. Such action soon loosens the heads, and crowns or deforms the end of the roll under the heads and causes the roll to run out of true. In the rolls with which this applicant is, fa: miliar, the rods and center shaft do not fit the holes through the roll, and the only support the heads have to keep them central is their engagement with the end of the roll.

The object of this invention is the production of means for securing the trunnions or journal heads, comprising adjustable parts of special construction and arrangement, as set out in the accompanying drawings, of which Figure 1 represents one end of a roll to which this invention has been applied. The parts are shown in section extending vertically and lengthwise at the Fig. 2 is a like sectional view of a modified application of this invention to the end of a roll. Fig.- 3 is a vertical, longitudinal section of the end portion of a roll showing the chambers or cavities formed for the reception of this invention. Fig. 4 is an end view of the roll illustrated in Fig. 3. Fig. 5 shows a portion of a center shaft with a modified device for holding the drawhead in its place upon the shaft.

Throughout the description and drawings the same letter is used to refer to the same part.

Considering the drawings, a roll A has a center bore a, and at the end of the roll is the trunnion or journal head B, provided with a hollow center 6. A center shaft 0 passes axially through the roll occupying the central passage or bore a, and having a portion 0 at the end, of reduced diameter, which passes through the hollow b of the trunnion B, and is provided with a nut externally, whereby the trunnion may be pressed against the end of the roll. The trunnion B has a base D and a peripheral base flange d, and the inclined bolts E, passing through the base D, secure the trunnion to the drawhead F, which has a threaded engagement with the shaft C, and is located in the'chamber f formed at the end of the roll. concentrically arranged with the chamber 7, is a circular recess which is provided as a base seat for the trunnion, and, it will be observed that the base seat G has a peripheral portion greater in depth and fashioned to fit the base flange d, which flange occupies the peripheral groove of the seat G when the parts are assembled. Base D has the slots 6 for bolts E.

Considering Fig. 2 it will be noted that V the roll H has a center shaft h, which terminates within the roll; The trunnion or j ournal head J is solid, and is secured by the inclined bolts j, passing through the base of the trunnion, to the drawhead K, which engages the center shaft as already described.

In Fig. 5, the drawhead L is not threaded, but is held to its position upon the center shaft C by means of the screw-threaded collar M. It is believed to be apparent that any suitable means for securing the drawhead upon the center shaft may be employed.

The drawhead may be made of any material strong enough to stand the strain. Bronze is desirable for the reason that it will not rust and stick to the shaft, and it can be removed easily when the wood part of the roll is renewed. By placing the drawhead of this invention back in the solid part of the roll, and constructing it to fit the chamber or counter bore 7 closely, the center shaft is held in its proper central position and prevented from vibrating. The short bolts take the place of long rods, and each of the bolts passes through a slot 9, the slots being best shown in Figs. 3 and 4:, in the outer edge of the chamber f. That engagement of the bolts with the slots 9, prevents the trunnions from turning with respect to the body of the roll when the power is applied to drive the roll. It is believed to be clear from the foregoing that any looseness trunnion having a base constructed to fit the base seat in the end of the roll, a drawhead engaging the said shaft within the roll, and bolts passing through the base of the trunnion and engaging the drawhead.

2. In a roll head, the combination with a roll having a chamber in one end and an annular base seat concentric with the chamber, the said base seat having a peripheral portion of greater depth than the seat forming a flange seat, of a central shaft within the roll, a trunnion having a base constructed to fit the said flange seat, a drawhead engaging the said shaft within the roll, and bolts passing through the base of the trunnion and engaging the drawhead.

3. In a roll head, the combination with a roll having a chamber in one end and an annular base seat concentric with the chamber, of a central shaft within the roll, a

trunnion having a base constructed to fit the base seat in the end of the roll, the said trunnion having a hollow central portion and the end of the said shaft passing through the. trunnion and having an external nut, a drawhead engaging the shaft within the roll, and bolts passing through the base of the trunnion and engaging the drawhead.

4. In a roll head, the combination with a roll having a chamber in one end and an annular base seat concentric with the chamber, of a central shaft within the roll, a trunnion having a base constructed to fit the base seat in the end of the roll, a drawhead engaging the said shaft within the roll and having a conical face, and bolts passing through the base of the trunnion inwardly and inclining toward the said shaft, the said conical face of the drawhead being provided with bolt holes threaded to engage the ends of the said bolts.

5. In a roll head, the combination with a roll having a chamber in one end, of a central shaft within the roll, a trunnion having a base arranged at the end of the roll, a drawhead, screw-threaded means for holding the drawhead in place upon the shaft within the said chamber, and means for securing the said trunnlon and drawhead together.

In testimony whereof I afiix my signature.

MORTIMER It. RUST.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

